[ x8 4 ] 
feemed of the fame kind as the former ; but, as the 
experiments were not tried fo exactly, they are not fet 
down. 
I endeavoured to colled in the fame manner the, 
air difeharged from bread and water by fermentation, 
but I could not get it to ferment, or yield any fenfible 
quantity of air; though I added a little putrid gravy 
by way of ferment. 
Received May 21, 1766. 
XX. A farther Account of the Polifh Cochi- 
neal : from Dr. Wolfe, of Warfaw. Com- 
municated by Henry Baker, F . R . S. 
Read June 5, "y N the LIVth volume of the Philofophi- 
JL cal Tranfadions, for the year 1764, 
Art. XV. the Royal Society has been pleafed to publifh 
two curious papers, communicated by Mr. Baker, 
from Dr. Wolfe of Warfaw, deferibing the Polifh 
Cochineal, the plants on whofe roots it is found, the 
manner of colleding and curing it, the method of 
dying therewith, and alfo the dodor’s own experi- 
ments on thefe curious infeds; the figures whereof 
are there given as engraven on a copper plate. 
Since that time, the dodor has been very induftrious 
in breeding and obferving thefe in feds, and has there- 
by difeovered the male fly, about which he was before 
uncertain; and has fent to Mr. Baker an elegant 
pidure 
